<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>
function setText()
{    //第一种属性操作”.“
	var Text=document.getElementById('div')
	Text.value="改文字成功！！！"                   
}        //第二种属性操作”[]“  
        // Text=document.getElementById('div')
        // Text=['value']="能改！"
		
		//var a='value'
		//Text=document.getElementById('div')
		//Text=[a]="能改！"
		
		//function setText(name)
		//{var Text=document.getElementById('div')
	   //	   Text[name]="改文字成！！"
	   //	   }
</script>    
</head>

<body>
<input type="text" id="div" />      <!--注意value和title-->
<input type="button" value="改文字" onclick="setText()" />
<!--<input type="button" value="改文字" onclick="setText('value或者任意属性')" />-->
</body>
</html>
